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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.text.source.ImageUtilities;
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14
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131
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15 import dwtx.jface.text.source.ISharedTextColors; // packageimport
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16 import dwtx.jface.text.source.ILineRange; // packageimport
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17 import dwtx.jface.text.source.IAnnotationPresentation; // packageimport
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18 import dwtx.jface.text.source.IVerticalRulerInfoExtension; // packageimport
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19 import dwtx.jface.text.source.ICharacterPairMatcher; // packageimport
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20 import dwtx.jface.text.source.TextInvocationContext; // packageimport
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21 import dwtx.jface.text.source.LineChangeHover; // packageimport
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22 import dwtx.jface.text.source.IChangeRulerColumn; // packageimport
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23 import dwtx.jface.text.source.IAnnotationMap; // packageimport
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24 import dwtx.jface.text.source.IAnnotationModelListenerExtension; // packageimport
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25 import dwtx.jface.text.source.ISourceViewerExtension2; // packageimport
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26 import dwtx.jface.text.source.IAnnotationHover; // packageimport
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27 import dwtx.jface.text.source.ContentAssistantFacade; // packageimport
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28 import dwtx.jface.text.source.IAnnotationAccess; // packageimport
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29 import dwtx.jface.text.source.IVerticalRulerExtension; // packageimport
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30 import dwtx.jface.text.source.IVerticalRulerColumn; // packageimport
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31 import dwtx.jface.text.source.LineNumberRulerColumn; // packageimport
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32 import dwtx.jface.text.source.MatchingCharacterPainter; // packageimport
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33 import dwtx.jface.text.source.IAnnotationModelExtension; // packageimport
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34 import dwtx.jface.text.source.ILineDifferExtension; // packageimport
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35 import dwtx.jface.text.source.DefaultCharacterPairMatcher; // packageimport
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36 import dwtx.jface.text.source.LineNumberChangeRulerColumn; // packageimport
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37 import dwtx.jface.text.source.IAnnotationAccessExtension; // packageimport
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38 import dwtx.jface.text.source.ISourceViewer; // packageimport
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39 import dwtx.jface.text.source.AnnotationModel; // packageimport
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40 import dwtx.jface.text.source.ILineDifferExtension2; // packageimport
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41 import dwtx.jface.text.source.IAnnotationModelListener; // packageimport
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42 import dwtx.jface.text.source.IVerticalRuler; // packageimport
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43 import dwtx.jface.text.source.DefaultAnnotationHover; // packageimport
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44 import dwtx.jface.text.source.SourceViewer; // packageimport
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45 import dwtx.jface.text.source.SourceViewerConfiguration; // packageimport
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46 import dwtx.jface.text.source.AnnotationBarHoverManager; // packageimport
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47 import dwtx.jface.text.source.CompositeRuler; // packageimport
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48 import dwtx.jface.text.source.VisualAnnotationModel; // packageimport
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49 import dwtx.jface.text.source.IAnnotationModel; // packageimport
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50 import dwtx.jface.text.source.ISourceViewerExtension3; // packageimport
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51 import dwtx.jface.text.source.ILineDiffInfo; // packageimport
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52 import dwtx.jface.text.source.VerticalRulerEvent; // packageimport
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53 import dwtx.jface.text.source.ChangeRulerColumn; // packageimport
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54 import dwtx.jface.text.source.ILineDiffer; // packageimport
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55 import dwtx.jface.text.source.AnnotationModelEvent; // packageimport
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56 import dwtx.jface.text.source.AnnotationColumn; // packageimport
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57 import dwtx.jface.text.source.AnnotationRulerColumn; // packageimport
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58 import dwtx.jface.text.source.IAnnotationHoverExtension; // packageimport
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59 import dwtx.jface.text.source.AbstractRulerColumn; // packageimport
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60 import dwtx.jface.text.source.ISourceViewerExtension; // packageimport
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61 import dwtx.jface.text.source.AnnotationMap; // packageimport
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62 import dwtx.jface.text.source.IVerticalRulerInfo; // packageimport
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63 import dwtx.jface.text.source.IAnnotationModelExtension2; // packageimport
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64 import dwtx.jface.text.source.LineRange; // packageimport
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65 import dwtx.jface.text.source.IAnnotationAccessExtension2; // packageimport
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66 import dwtx.jface.text.source.VerticalRuler; // packageimport
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67 import dwtx.jface.text.source.JFaceTextMessages; // packageimport
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68 import dwtx.jface.text.source.IOverviewRuler; // packageimport
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69 import dwtx.jface.text.source.Annotation; // packageimport
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70 import dwtx.jface.text.source.IVerticalRulerListener; // packageimport
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71 import dwtx.jface.text.source.ISourceViewerExtension4; // packageimport
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72 import dwtx.jface.text.source.AnnotationPainter; // packageimport
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73 import dwtx.jface.text.source.IAnnotationHoverExtension2; // packageimport
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74 import dwtx.jface.text.source.OverviewRuler; // packageimport
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75 import dwtx.jface.text.source.OverviewRulerHoverManager; // packageimport
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76
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77
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129
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78 import dwt.dwthelper.utils;
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79
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80 import dwt.DWT;
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81 import dwt.graphics.FontMetrics;
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82 import dwt.graphics.GC;
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83 import dwt.graphics.Image;
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84 import dwt.graphics.Rectangle;
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85 import dwt.widgets.Canvas;
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86
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87 /**
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88 * Provides methods for drawing images onto a canvas.
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89 * <p>
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90 * This class is neither intended to be instantiated nor subclassed.
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91 * </p>
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92 *
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93 * @since 3.0
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94 * @noinstantiate This class is not intended to be instantiated by clients.
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95 * @noextend This class is not intended to be subclassed by clients.
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96 */
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97 public class ImageUtilities {
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98
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99 /**
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100 * Draws an image aligned inside the given rectangle on the given canvas.
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101 *
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102 * @param image the image to be drawn
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103 * @param gc the drawing GC
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104 * @param canvas the canvas on which to draw
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105 * @param r the clipping rectangle
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106 * @param halign the horizontal alignment of the image to be drawn
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107 * @param valign the vertical alignment of the image to be drawn
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108 */
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109 public static void drawImage(Image image, GC gc, Canvas canvas, Rectangle r, int halign, int valign) {
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110 if (image !is null) {
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111
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112 Rectangle bounds= image.getBounds();
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113
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114 int x= 0;
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115 switch(halign) {
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116 case DWT.LEFT:
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117 break;
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118 case DWT.CENTER:
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119 x= (r.width - bounds.width) / 2;
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120 break;
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121 case DWT.RIGHT:
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122 x= r.width - bounds.width;
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123 break;
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124 }
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125
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126 int y= 0;
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127 switch (valign) {
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128 case DWT.TOP: {
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129 FontMetrics fontMetrics= gc.getFontMetrics();
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130 y= (fontMetrics.getHeight() - bounds.height)/2;
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131 break;
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132 }
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133 case DWT.CENTER:
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134 y= (r.height - bounds.height) / 2;
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135 break;
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136 case DWT.BOTTOM: {
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137 FontMetrics fontMetrics= gc.getFontMetrics();
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138 y= r.height - (fontMetrics.getHeight() + bounds.height)/2;
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139 break;
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140 }
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141 }
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142
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143 gc.drawImage(image, r.x+x, r.y+y);
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144 }
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145 }
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146
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147 /**
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148 * Draws an image aligned inside the given rectangle on the given canvas.
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149 *
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150 * @param image the image to be drawn
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151 * @param gc the drawing GC
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152 * @param canvas the canvas on which to draw
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153 * @param r the clipping rectangle
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154 * @param align the alignment of the image to be drawn
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155 */
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145
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156 public static void drawImage(Image image, GC gc, Canvas canvas, Rectangle r, int align_) {
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157 drawImage(image, gc, canvas, r, align_, DWT.CENTER);
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129
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158 }
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159 }
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